W. Yan, and C. Clack. GECCO 2006: Proceedings of the 8th annual conference
on Genetic and evolutionary computation, 2, page 1817--1824. Seattle, Washington, USA, ACM Press, (8-12 July 2006)
W. Yan, and C. Clack. GECCO '07: Proceedings of the 9th annual conference on
Genetic and evolutionary computation, 2, page 2234--2241. London, ACM Press, (7-11 July 2007)